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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: Msrp.html 19 2015-01-15 23:13:28Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.dellroad.msrp;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import java.io.IOException;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import java.net.InetSocketAddress;<a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.nio.channels.ClosedChannelException;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.nio.channels.ClosedSelectorException;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.nio.channels.SelectableChannel;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.nio.channels.SelectionKey;<a name="line.15"></a>
<span class="sourceLineNo">016</span>import java.nio.channels.Selector;<a name="line.16"></a>
<span class="sourceLineNo">017</span>import java.nio.channels.ServerSocketChannel;<a name="line.17"></a>
<span class="sourceLineNo">018</span>import java.nio.channels.SocketChannel;<a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.ArrayList;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.HashSet;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.Iterator;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.SortedMap;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.TreeMap;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.util.concurrent.Executor;<a name="line.24"></a>
<span class="sourceLineNo">025</span><a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.dellroad.msrp.msg.MsrpInputParser;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.dellroad.msrp.msg.MsrpMessage;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.dellroad.msrp.msg.MsrpRequest;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.slf4j.Logger;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.slf4j.LoggerFactory;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>/**<a name="line.32"></a>
<span class="sourceLineNo">033</span> * An MSRP protocol stack.<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * &lt;p&gt;<a name="line.35"></a>
<span class="sourceLineNo">036</span> * Instances must be {@link #start}ed before being used. Once started, new MSRP {@link Session}s may be created<a name="line.36"></a>
<span class="sourceLineNo">037</span> * by invoking {@link #createSession createSession()} with the local and remote URI's, a {@link SessionListener}<a name="line.37"></a>
<span class="sourceLineNo">038</span> * for receiving notification of session events, and an {@link Executor} on which all callback notifications will<a name="line.38"></a>
<span class="sourceLineNo">039</span> * be delivered.<a name="line.39"></a>
<span class="sourceLineNo">040</span> * &lt;/p&gt;<a name="line.40"></a>
<span class="sourceLineNo">041</span> *<a name="line.41"></a>
<span class="sourceLineNo">042</span> * &lt;p&gt;<a name="line.42"></a>
<span class="sourceLineNo">043</span> * Invoking {@link #stop} shuts down all active sessions and stops the instance. Stopped instances may be restarted if desired.<a name="line.43"></a>
<span class="sourceLineNo">044</span> * &lt;/p&gt;<a name="line.44"></a>
<span class="sourceLineNo">045</span> */<a name="line.45"></a>
<span class="sourceLineNo">046</span>public class Msrp {<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Default maximum number of allowed sessions ({@value #DEFAULT_MAX_SESSIONS}).<a name="line.49"></a>
<span class="sourceLineNo">050</span>     *<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @see #getMaxSessions<a name="line.51"></a>
<span class="sourceLineNo">052</span>     */<a name="line.52"></a>
<span class="sourceLineNo">053</span>    public static final int DEFAULT_MAX_SESSIONS = 1000;<a name="line.53"></a>
<span class="sourceLineNo">054</span><a name="line.54"></a>
<span class="sourceLineNo">055</span>    /**<a name="line.55"></a>
<span class="sourceLineNo">056</span>     * Default idle connection timeout ({@value #DEFAULT_MAX_IDLE_TIME} milliseconds).<a name="line.56"></a>
<span class="sourceLineNo">057</span>     *<a name="line.57"></a>
<span class="sourceLineNo">058</span>     * @see #getMaxIdleTime<a name="line.58"></a>
<span class="sourceLineNo">059</span>     */<a name="line.59"></a>
<span class="sourceLineNo">060</span>    public static final long DEFAULT_MAX_IDLE_TIME = 30 * 1000L;        // 30 sec<a name="line.60"></a>
<span class="sourceLineNo">061</span><a name="line.61"></a>
<span class="sourceLineNo">062</span>    /**<a name="line.62"></a>
<span class="sourceLineNo">063</span>     * Default connect timeout for outgoing connections ({@value #DEFAULT_CONNECT_TIMEOUT} milliseconds).<a name="line.63"></a>
<span class="sourceLineNo">064</span>     *<a name="line.64"></a>
<span class="sourceLineNo">065</span>     * @see #getConnectTimeout<a name="line.65"></a>
<span class="sourceLineNo">066</span>     */<a name="line.66"></a>
<span class="sourceLineNo">067</span>    public static final long DEFAULT_CONNECT_TIMEOUT = 20 * 1000L;      // 20 sec<a name="line.67"></a>
<span class="sourceLineNo">068</span><a name="line.68"></a>
<span class="sourceLineNo">069</span>    private final Logger log = LoggerFactory.getLogger(this.getClass());<a name="line.69"></a>
<span class="sourceLineNo">070</span>    private final TreeMap&lt;MsrpUri, Session&gt; sessionMap = new TreeMap&lt;&gt;(MsrpUriComparator.INSTANCE);<a name="line.70"></a>
<span class="sourceLineNo">071</span>    private final HashSet&lt;Connection&gt; connections = new HashSet&lt;&gt;();<a name="line.71"></a>
<span class="sourceLineNo">072</span><a name="line.72"></a>
<span class="sourceLineNo">073</span>    private InetSocketAddress listenAddress;<a name="line.73"></a>
<span class="sourceLineNo">074</span>    private int maxSessions = DEFAULT_MAX_SESSIONS;<a name="line.74"></a>
<span class="sourceLineNo">075</span>    private long maxContentLength = MsrpInputParser.DEFAULT_MAX_CONTENT_LENGTH;<a name="line.75"></a>
<span class="sourceLineNo">076</span>    private long maxIdleTime = DEFAULT_MAX_IDLE_TIME;<a name="line.76"></a>
<span class="sourceLineNo">077</span>    private long connectTimeout = DEFAULT_CONNECT_TIMEOUT;<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>    private ServerSocketChannel serverSocketChannel;<a name="line.79"></a>
<span class="sourceLineNo">080</span>    private SelectionKey selectionKey;<a name="line.80"></a>
<span class="sourceLineNo">081</span>    private Selector selector;<a name="line.81"></a>
<span class="sourceLineNo">082</span>    private ServiceThread serviceThread;<a name="line.82"></a>
<span class="sourceLineNo">083</span><a name="line.83"></a>
<span class="sourceLineNo">084</span>    /**<a name="line.84"></a>
<span class="sourceLineNo">085</span>     * Constructor.<a name="line.85"></a>
<span class="sourceLineNo">086</span>     */<a name="line.86"></a>
<span class="sourceLineNo">087</span>    public Msrp() {<a name="line.87"></a>
<span class="sourceLineNo">088</span>    }<a name="line.88"></a>
<span class="sourceLineNo">089</span><a name="line.89"></a>
<span class="sourceLineNo">090</span>// Public API<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span>    /**<a name="line.92"></a>
<span class="sourceLineNo">093</span>     * Get the {@link InetSocketAddress} to which this instance is bound.<a name="line.93"></a>
<span class="sourceLineNo">094</span>     *<a name="line.94"></a>
<span class="sourceLineNo">095</span>     * @return listen address, possibly null<a name="line.95"></a>
<span class="sourceLineNo">096</span>     */<a name="line.96"></a>
<span class="sourceLineNo">097</span>    public synchronized InetSocketAddress getListenAddress() {<a name="line.97"></a>
<span class="sourceLineNo">098</span>        return this.listenAddress;<a name="line.98"></a>
<span class="sourceLineNo">099</span>    }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span>    /**<a name="line.101"></a>
<span class="sourceLineNo">102</span>     * Set the {@link InetSocketAddress} to which this instance should bind.<a name="line.102"></a>
<span class="sourceLineNo">103</span>     *<a name="line.103"></a>
<span class="sourceLineNo">104</span>     * &lt;p&gt;<a name="line.104"></a>
<span class="sourceLineNo">105</span>     * If this instance is already started, invoking this method will have no effect until it is {@linkplain #stop stopped}<a name="line.105"></a>
<span class="sourceLineNo">106</span>     * and restarted.<a name="line.106"></a>
<span class="sourceLineNo">107</span>     * &lt;/p&gt;<a name="line.107"></a>
<span class="sourceLineNo">108</span>     *<a name="line.108"></a>
<span class="sourceLineNo">109</span>     * &lt;p&gt;<a name="line.109"></a>
<span class="sourceLineNo">110</span>     * By default, instances listen on all interfaces on port {@link MsrpConstants#DEFAULT_PORT}.<a name="line.110"></a>
<span class="sourceLineNo">111</span>     * &lt;/p&gt;<a name="line.111"></a>
<span class="sourceLineNo">112</span>     *<a name="line.112"></a>
<span class="sourceLineNo">113</span>     * @param listenAddress listen address, or null to listen on all interfaces on port {@link MsrpConstants#DEFAULT_PORT}<a name="line.113"></a>
<span class="sourceLineNo">114</span>     */<a name="line.114"></a>
<span class="sourceLineNo">115</span>    public synchronized void setListenAddress(InetSocketAddress listenAddress) {<a name="line.115"></a>
<span class="sourceLineNo">116</span>        this.listenAddress = listenAddress;<a name="line.116"></a>
<span class="sourceLineNo">117</span>    }<a name="line.117"></a>
<span class="sourceLineNo">118</span><a name="line.118"></a>
<span class="sourceLineNo">119</span>    /**<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * Get the maximum number of allowed sessions. Default is {@value #DEFAULT_MAX_SESSIONS}.<a name="line.120"></a>
<span class="sourceLineNo">121</span>     */<a name="line.121"></a>
<span class="sourceLineNo">122</span>    public synchronized int getMaxSessions() {<a name="line.122"></a>
<span class="sourceLineNo">123</span>        return this.maxSessions;<a name="line.123"></a>
<span class="sourceLineNo">124</span>    }<a name="line.124"></a>
<span class="sourceLineNo">125</span>    public synchronized void setMaxSessions(int maxSessions) {<a name="line.125"></a>
<span class="sourceLineNo">126</span>        this.maxSessions = maxSessions;<a name="line.126"></a>
<span class="sourceLineNo">127</span>    }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span>    /**<a name="line.129"></a>
<span class="sourceLineNo">130</span>     * Get the maximum allowed content length for incoming messages. Default is {@link MsrpInputParser#DEFAULT_MAX_CONTENT_LENGTH}.<a name="line.130"></a>
<span class="sourceLineNo">131</span>     */<a name="line.131"></a>
<span class="sourceLineNo">132</span>    public synchronized long getMaxContentLength() {<a name="line.132"></a>
<span class="sourceLineNo">133</span>        return this.maxContentLength;<a name="line.133"></a>
<span class="sourceLineNo">134</span>    }<a name="line.134"></a>
<span class="sourceLineNo">135</span>    public synchronized void setMaxContentLength(long maxContentLength) {<a name="line.135"></a>
<span class="sourceLineNo">136</span>        this.maxContentLength = maxContentLength;<a name="line.136"></a>
<span class="sourceLineNo">137</span>    }<a name="line.137"></a>
<span class="sourceLineNo">138</span><a name="line.138"></a>
<span class="sourceLineNo">139</span>    /**<a name="line.139"></a>
<span class="sourceLineNo">140</span>     * Get the maximum idle time for connections that have no associated sessions. Default is {@value #DEFAULT_MAX_IDLE_TIME}ms.<a name="line.140"></a>
<span class="sourceLineNo">141</span>     */<a name="line.141"></a>
<span class="sourceLineNo">142</span>    public synchronized long getMaxIdleTime() {<a name="line.142"></a>
<span class="sourceLineNo">143</span>        return this.maxIdleTime;<a name="line.143"></a>
<span class="sourceLineNo">144</span>    }<a name="line.144"></a>
<span class="sourceLineNo">145</span>    public synchronized void setMaxIdleTime(long maxIdleTime) {<a name="line.145"></a>
<span class="sourceLineNo">146</span>        this.maxIdleTime = maxIdleTime;<a name="line.146"></a>
<span class="sourceLineNo">147</span>    }<a name="line.147"></a>
<span class="sourceLineNo">148</span><a name="line.148"></a>
<span class="sourceLineNo">149</span>    /**<a name="line.149"></a>
<span class="sourceLineNo">150</span>     * Get the outgoing connection timeout in milliseconds. Default is {@value #DEFAULT_CONNECT_TIMEOUT}ms.<a name="line.150"></a>
<span class="sourceLineNo">151</span>     */<a name="line.151"></a>
<span class="sourceLineNo">152</span>    public synchronized long getConnectTimeout() {<a name="line.152"></a>
<span class="sourceLineNo">153</span>        return this.connectTimeout;<a name="line.153"></a>
<span class="sourceLineNo">154</span>    }<a name="line.154"></a>
<span class="sourceLineNo">155</span>    public synchronized void setConnectTimeout(long connectTimeout) {<a name="line.155"></a>
<span class="sourceLineNo">156</span>        this.connectTimeout = connectTimeout;<a name="line.156"></a>
<span class="sourceLineNo">157</span>    }<a name="line.157"></a>
<span class="sourceLineNo">158</span><a name="line.158"></a>
<span class="sourceLineNo">159</span>    /**<a name="line.159"></a>
<span class="sourceLineNo">160</span>     * Start this instance. Does nothing if already started.<a name="line.160"></a>
<span class="sourceLineNo">161</span>     *<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * @throws IOException if server socket cannot be created<a name="line.162"></a>
<span class="sourceLineNo">163</span>     */<a name="line.163"></a>
<span class="sourceLineNo">164</span>    public synchronized void start() throws IOException {<a name="line.164"></a>
<span class="sourceLineNo">165</span>        if (this.serviceThread != null)<a name="line.165"></a>
<span class="sourceLineNo">166</span>            return;<a name="line.166"></a>
<span class="sourceLineNo">167</span>        if (this.listenAddress == null)<a name="line.167"></a>
<span class="sourceLineNo">168</span>            this.listenAddress = new InetSocketAddress(MsrpConstants.DEFAULT_PORT);<a name="line.168"></a>
<span class="sourceLineNo">169</span>        if (this.log.isDebugEnabled())<a name="line.169"></a>
<span class="sourceLineNo">170</span>            this.log.debug("starting " + this + " listening on " + this.listenAddress);<a name="line.170"></a>
<span class="sourceLineNo">171</span>        boolean successful = false;<a name="line.171"></a>
<span class="sourceLineNo">172</span>        try {<a name="line.172"></a>
<span class="sourceLineNo">173</span>            this.selector = Selector.open();<a name="line.173"></a>
<span class="sourceLineNo">174</span>            this.serverSocketChannel = ServerSocketChannel.open();<a name="line.174"></a>
<span class="sourceLineNo">175</span>            this.configureServerSocketChannel(this.serverSocketChannel);<a name="line.175"></a>
<span class="sourceLineNo">176</span>            this.serverSocketChannel.configureBlocking(false);<a name="line.176"></a>
<span class="sourceLineNo">177</span>            this.serverSocketChannel.bind(this.listenAddress);<a name="line.177"></a>
<span class="sourceLineNo">178</span>            this.selectionKey = this.createSelectionKey(this.serverSocketChannel, new SelectorService() {<a name="line.178"></a>
<span class="sourceLineNo">179</span>                @Override<a name="line.179"></a>
<span class="sourceLineNo">180</span>                public void serviceIO(SelectionKey key) throws IOException {<a name="line.180"></a>
<span class="sourceLineNo">181</span>                    if (key.isAcceptable())<a name="line.181"></a>
<span class="sourceLineNo">182</span>                        Msrp.this.handleAccept();<a name="line.182"></a>
<span class="sourceLineNo">183</span>                }<a name="line.183"></a>
<span class="sourceLineNo">184</span>                @Override<a name="line.184"></a>
<span class="sourceLineNo">185</span>                public void close(Exception cause) {<a name="line.185"></a>
<span class="sourceLineNo">186</span>                    Msrp.this.log.error("stopping " + this + " due to exception", cause);<a name="line.186"></a>
<span class="sourceLineNo">187</span>                    Msrp.this.stop();<a name="line.187"></a>
<span class="sourceLineNo">188</span>                }<a name="line.188"></a>
<span class="sourceLineNo">189</span>            });<a name="line.189"></a>
<span class="sourceLineNo">190</span>            this.selectForAccept(true);<a name="line.190"></a>
<span class="sourceLineNo">191</span>            this.serviceThread = new ServiceThread();<a name="line.191"></a>
<span class="sourceLineNo">192</span>            this.serviceThread.start();<a name="line.192"></a>
<span class="sourceLineNo">193</span>            successful = true;<a name="line.193"></a>
<span class="sourceLineNo">194</span>        } finally {<a name="line.194"></a>
<span class="sourceLineNo">195</span>            if (!successful)<a name="line.195"></a>
<span class="sourceLineNo">196</span>                this.stop();<a name="line.196"></a>
<span class="sourceLineNo">197</span>        }<a name="line.197"></a>
<span class="sourceLineNo">198</span>    }<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span>    /**<a name="line.200"></a>
<span class="sourceLineNo">201</span>     * Stop this instance. Does nothing if already stopped.<a name="line.201"></a>
<span class="sourceLineNo">202</span>     */<a name="line.202"></a>
<span class="sourceLineNo">203</span>    public void stop() {<a name="line.203"></a>
<span class="sourceLineNo">204</span>        Thread waitForThread = null;<a name="line.204"></a>
<span class="sourceLineNo">205</span>        synchronized (this) {<a name="line.205"></a>
<span class="sourceLineNo">206</span>            if (this.serviceThread != null &amp;&amp; this.log.isDebugEnabled())<a name="line.206"></a>
<span class="sourceLineNo">207</span>                this.log.debug("stopping " + this);<a name="line.207"></a>
<span class="sourceLineNo">208</span>            if (this.serverSocketChannel != null) {<a name="line.208"></a>
<span class="sourceLineNo">209</span>                try {<a name="line.209"></a>
<span class="sourceLineNo">210</span>                    this.serverSocketChannel.close();<a name="line.210"></a>
<span class="sourceLineNo">211</span>                } catch (IOException e) {<a name="line.211"></a>
<span class="sourceLineNo">212</span>                    // ignore<a name="line.212"></a>
<span class="sourceLineNo">213</span>                }<a name="line.213"></a>
<span class="sourceLineNo">214</span>                this.serverSocketChannel = null;<a name="line.214"></a>
<span class="sourceLineNo">215</span>            }<a name="line.215"></a>
<span class="sourceLineNo">216</span>            if (this.selector != null) {<a name="line.216"></a>
<span class="sourceLineNo">217</span>                try {<a name="line.217"></a>
<span class="sourceLineNo">218</span>                    this.selector.close();<a name="line.218"></a>
<span class="sourceLineNo">219</span>                } catch (IOException e) {<a name="line.219"></a>
<span class="sourceLineNo">220</span>                    // ignore<a name="line.220"></a>
<span class="sourceLineNo">221</span>                }<a name="line.221"></a>
<span class="sourceLineNo">222</span>                this.selector = null;<a name="line.222"></a>
<span class="sourceLineNo">223</span>            }<a name="line.223"></a>
<span class="sourceLineNo">224</span>            if (this.serviceThread != null) {<a name="line.224"></a>
<span class="sourceLineNo">225</span>                this.serviceThread.interrupt();<a name="line.225"></a>
<span class="sourceLineNo">226</span>                if (!this.serviceThread.equals(Thread.currentThread()))<a name="line.226"></a>
<span class="sourceLineNo">227</span>                    waitForThread = this.serviceThread;<a name="line.227"></a>
<span class="sourceLineNo">228</span>                this.serviceThread = null;<a name="line.228"></a>
<span class="sourceLineNo">229</span>            }<a name="line.229"></a>
<span class="sourceLineNo">230</span>            this.selectionKey = null;<a name="line.230"></a>
<span class="sourceLineNo">231</span>        }<a name="line.231"></a>
<span class="sourceLineNo">232</span>        if (waitForThread != null) {<a name="line.232"></a>
<span class="sourceLineNo">233</span>            try {<a name="line.233"></a>
<span class="sourceLineNo">234</span>                waitForThread.join();<a name="line.234"></a>
<span class="sourceLineNo">235</span>            } catch (InterruptedException e) {<a name="line.235"></a>
<span class="sourceLineNo">236</span>                Thread.currentThread().interrupt();<a name="line.236"></a>
<span class="sourceLineNo">237</span>            }<a name="line.237"></a>
<span class="sourceLineNo">238</span>        }<a name="line.238"></a>
<span class="sourceLineNo">239</span>    }<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span>    /**<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * Create a new {@link Session} using the given local and remote URIs.<a name="line.242"></a>
<span class="sourceLineNo">243</span>     *<a name="line.243"></a>
<span class="sourceLineNo">244</span>     * &lt;p&gt;<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * Notification of {@link Session} events will be delivered to {@code listener} using the provided {@code callbackExecutor};<a name="line.245"></a>
<span class="sourceLineNo">246</span>     * the {@code callbackExecutor} &lt;b&gt;must execute actions in a separate thread&lt;/b&gt; from the one that invoked it in order<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * to avoid deadlocks and re-entrancy problems. For example, using an {@link Executor} returned by<a name="line.247"></a>
<span class="sourceLineNo">248</span>     * {@link java.util.concurrent.Executors#newSingleThreadScheduledExecutor} is sufficient.<a name="line.248"></a>
<span class="sourceLineNo">249</span>     * &lt;/p&gt;<a name="line.249"></a>
<span class="sourceLineNo">250</span>     *<a name="line.250"></a>
<span class="sourceLineNo">251</span>     * @param localURI URI identifying the local side of the session<a name="line.251"></a>
<span class="sourceLineNo">252</span>     * @param remoteURI URI identifying the remote side of the session<a name="line.252"></a>
<span class="sourceLineNo">253</span>     * @param endpoint destination for outgoing TCP connection (if any), or null to infer from {@code remoteURI};<a name="line.253"></a>
<span class="sourceLineNo">254</span>     *  ignored if {@code !active}<a name="line.254"></a>
<span class="sourceLineNo">255</span>     * @param listener listener for session events<a name="line.255"></a>
<span class="sourceLineNo">256</span>     * @param callbackExecutor executes listener callbacks; must do so in a separate thread<a name="line.256"></a>
<span class="sourceLineNo">257</span>     * @param active true if this side is active and should initiate the connection, false to wait for the remote side connect to us<a name="line.257"></a>
<span class="sourceLineNo">258</span>     * @return newly created session, or null if there are already too many existing sessions<a name="line.258"></a>
<span class="sourceLineNo">259</span>     * @throws IllegalStateException if this instance is not {@linkplain #start started}<a name="line.259"></a>
<span class="sourceLineNo">260</span>     * @throws IllegalArgumentException if any parameter other than {@code endpoint} is null<a name="line.260"></a>
<span class="sourceLineNo">261</span>     * @throws IllegalArgumentException if a session corresponding to {@code localURI} already exists<a name="line.261"></a>
<span class="sourceLineNo">262</span>     */<a name="line.262"></a>
<span class="sourceLineNo">263</span>    public synchronized Session createSession(MsrpUri localURI, MsrpUri remoteURI, Endpoint endpoint,<a name="line.263"></a>
<span class="sourceLineNo">264</span>      SessionListener listener, Executor callbackExecutor, boolean active) {<a name="line.264"></a>
<span class="sourceLineNo">265</span><a name="line.265"></a>
<span class="sourceLineNo">266</span>        // Sanity check<a name="line.266"></a>
<span class="sourceLineNo">267</span>        if (localURI == null)<a name="line.267"></a>
<span class="sourceLineNo">268</span>            throw new IllegalArgumentException("null localURI");<a name="line.268"></a>
<span class="sourceLineNo">269</span>        if (remoteURI == null)<a name="line.269"></a>
<span class="sourceLineNo">270</span>            throw new IllegalArgumentException("null remoteURI");<a name="line.270"></a>
<span class="sourceLineNo">271</span>        if (listener == null)<a name="line.271"></a>
<span class="sourceLineNo">272</span>            throw new IllegalArgumentException("null listener");<a name="line.272"></a>
<span class="sourceLineNo">273</span>        if (callbackExecutor == null)<a name="line.273"></a>
<span class="sourceLineNo">274</span>            throw new IllegalArgumentException("null callbackExecutor");<a name="line.274"></a>
<span class="sourceLineNo">275</span>        if (this.serviceThread == null)<a name="line.275"></a>
<span class="sourceLineNo">276</span>            throw new IllegalStateException("not started");<a name="line.276"></a>
<span class="sourceLineNo">277</span><a name="line.277"></a>
<span class="sourceLineNo">278</span>        // Infer endpoint if needed<a name="line.278"></a>
<span class="sourceLineNo">279</span>        if (endpoint == null)<a name="line.279"></a>
<span class="sourceLineNo">280</span>            endpoint = remoteURI.toEndpoint();<a name="line.280"></a>
<span class="sourceLineNo">281</span><a name="line.281"></a>
<span class="sourceLineNo">282</span>        // Check for duplicate session<a name="line.282"></a>
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<span class="sourceLineNo">285</span><a name="line.285"></a>
<span class="sourceLineNo">286</span>        // Check session size limit<a name="line.286"></a>
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<span class="sourceLineNo">288</span>            this.log.warn("too many MSRP connections (" + this.sessionMap.size() + " &gt;= "<a name="line.288"></a>
<span class="sourceLineNo">289</span>              + this.maxSessions + "), not creating any more");<a name="line.289"></a>
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<span class="sourceLineNo">292</span><a name="line.292"></a>
<span class="sourceLineNo">293</span>        // Create new session<a name="line.293"></a>
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<span class="sourceLineNo">296</span><a name="line.296"></a>
<span class="sourceLineNo">297</span>        // Logging<a name="line.297"></a>
<span class="sourceLineNo">298</span>        if (this.log.isDebugEnabled())<a name="line.298"></a>
<span class="sourceLineNo">299</span>            this.log.debug(this + " created new session " + session);<a name="line.299"></a>
<span class="sourceLineNo">300</span><a name="line.300"></a>
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<span class="sourceLineNo">304</span><a name="line.304"></a>
<span class="sourceLineNo">305</span>        // Re-use existing connection to this endpoint if one already exists<a name="line.305"></a>
<span class="sourceLineNo">306</span>        for (Connection connection : this.connections) {<a name="line.306"></a>
<span class="sourceLineNo">307</span>            if (connection.getEndpoint().equals(endpoint)) {<a name="line.307"></a>
<span class="sourceLineNo">308</span>                if (this.log.isDebugEnabled())<a name="line.308"></a>
<span class="sourceLineNo">309</span>                    this.log.debug(this + " binding " + session + " to existing " + connection);<a name="line.309"></a>
<span class="sourceLineNo">310</span>                session.setConnection(connection);<a name="line.310"></a>
<span class="sourceLineNo">311</span>                break;<a name="line.311"></a>
<span class="sourceLineNo">312</span>            }<a name="line.312"></a>
<span class="sourceLineNo">313</span>        }<a name="line.313"></a>
<span class="sourceLineNo">314</span><a name="line.314"></a>
<span class="sourceLineNo">315</span>        // Send an empty message to bind peer's connection to this session<a name="line.315"></a>
<span class="sourceLineNo">316</span>        session.send(null, null);<a name="line.316"></a>
<span class="sourceLineNo">317</span><a name="line.317"></a>
<span class="sourceLineNo">318</span>        // Wakeup service thread<a name="line.318"></a>
<span class="sourceLineNo">319</span>        this.wakeup();<a name="line.319"></a>
<span class="sourceLineNo">320</span><a name="line.320"></a>
<span class="sourceLineNo">321</span>        // Done<a name="line.321"></a>
<span class="sourceLineNo">322</span>        return session;<a name="line.322"></a>
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<span class="sourceLineNo">324</span><a name="line.324"></a>
<span class="sourceLineNo">325</span>    /**<a name="line.325"></a>
<span class="sourceLineNo">326</span>     * Get all known {@link Session}s keyed by local URI.<a name="line.326"></a>
<span class="sourceLineNo">327</span>     * Note that as keys in the returned map, URI's are compared for equality according to RFC 4579, Section 6.1.<a name="line.327"></a>
<span class="sourceLineNo">328</span>     *<a name="line.328"></a>
<span class="sourceLineNo">329</span>     * @return mutable "snapshot" mapping from local URI to {@link Session}<a name="line.329"></a>
<span class="sourceLineNo">330</span>     */<a name="line.330"></a>
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<span class="sourceLineNo">334</span><a name="line.334"></a>
<span class="sourceLineNo">335</span>    /**<a name="line.335"></a>
<span class="sourceLineNo">336</span>     * Configure the {@link ServerSocketChannel} to be used by this instance. This method is invoked by {@link #start}.<a name="line.336"></a>
<span class="sourceLineNo">337</span>     *<a name="line.337"></a>
<span class="sourceLineNo">338</span>     * &lt;p&gt;<a name="line.338"></a>
<span class="sourceLineNo">339</span>     * The implementation in {@link Msrp} does nothing. Subclasses may override to configure socket options, etc.<a name="line.339"></a>
<span class="sourceLineNo">340</span>     * &lt;/p&gt;<a name="line.340"></a>
<span class="sourceLineNo">341</span>     *<a name="line.341"></a>
<span class="sourceLineNo">342</span>     * @param serverSocketChannel channel to configure<a name="line.342"></a>
<span class="sourceLineNo">343</span>     */<a name="line.343"></a>
<span class="sourceLineNo">344</span>    protected void configureServerSocketChannel(ServerSocketChannel serverSocketChannel) {<a name="line.344"></a>
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<span class="sourceLineNo">346</span><a name="line.346"></a>
<span class="sourceLineNo">347</span>    /**<a name="line.347"></a>
<span class="sourceLineNo">348</span>     * Configure a {@link SocketChannel} to be used by this instance with the given {@link Endpoint}.<a name="line.348"></a>
<span class="sourceLineNo">349</span>     *<a name="line.349"></a>
<span class="sourceLineNo">350</span>     * &lt;p&gt;<a name="line.350"></a>
<span class="sourceLineNo">351</span>     * The implementation in {@link Msrp} does nothing. Subclasses may override to configure socket options, etc.<a name="line.351"></a>
<span class="sourceLineNo">352</span>     * &lt;/p&gt;<a name="line.352"></a>
<span class="sourceLineNo">353</span>     *<a name="line.353"></a>
<span class="sourceLineNo">354</span>     * @param socketChannel channel to configure<a name="line.354"></a>
<span class="sourceLineNo">355</span>     * @param endpoint the remote endpoint with which the socket will be used to communicate<a name="line.355"></a>
<span class="sourceLineNo">356</span>     */<a name="line.356"></a>
<span class="sourceLineNo">357</span>    protected void configureSocketChannel(SocketChannel socketChannel, Endpoint endpoint) {<a name="line.357"></a>
<span class="sourceLineNo">358</span>    }<a name="line.358"></a>
<span class="sourceLineNo">359</span><a name="line.359"></a>
<span class="sourceLineNo">360</span>    @Override<a name="line.360"></a>
<span class="sourceLineNo">361</span>    public String toString() {<a name="line.361"></a>
<span class="sourceLineNo">362</span>        return "Msrp[port=" + this.listenAddress.getPort() + "]";<a name="line.362"></a>
<span class="sourceLineNo">363</span>    }<a name="line.363"></a>
<span class="sourceLineNo">364</span><a name="line.364"></a>
<span class="sourceLineNo">365</span>// Internal API<a name="line.365"></a>
<span class="sourceLineNo">366</span><a name="line.366"></a>
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<span class="sourceLineNo">368</span>    Connection createConnection(Endpoint endpoint) throws IOException {<a name="line.368"></a>
<span class="sourceLineNo">369</span>        final SocketChannel socketChannel = SocketChannel.open();<a name="line.369"></a>
<span class="sourceLineNo">370</span>        this.configureSocketChannel(socketChannel, endpoint);<a name="line.370"></a>
<span class="sourceLineNo">371</span>        socketChannel.configureBlocking(false);<a name="line.371"></a>
<span class="sourceLineNo">372</span>        if (this.log.isDebugEnabled())<a name="line.372"></a>
<span class="sourceLineNo">373</span>            this.log.debug(this + " looking up DNS name `" + endpoint.getHost() + "'");<a name="line.373"></a>
<span class="sourceLineNo">374</span>        final InetSocketAddress socketAddress = endpoint.toSocketAddress();<a name="line.374"></a>
<span class="sourceLineNo">375</span>        if (socketAddress.isUnresolved())<a name="line.375"></a>
<span class="sourceLineNo">376</span>            throw new IOException("DNS lookup failure for `" + socketAddress.getHostString() + "'");<a name="line.376"></a>
<span class="sourceLineNo">377</span>        if (this.log.isDebugEnabled()) {<a name="line.377"></a>
<span class="sourceLineNo">378</span>            this.log.debug(this + ": `" + endpoint.getHost() + "' resolves to "<a name="line.378"></a>
<span class="sourceLineNo">379</span>              + socketAddress.getAddress() + "; initiating connection");<a name="line.379"></a>
<span class="sourceLineNo">380</span>        }<a name="line.380"></a>
<span class="sourceLineNo">381</span>        socketChannel.connect(socketAddress);<a name="line.381"></a>
<span class="sourceLineNo">382</span>        final Connection connection = new Connection(this, endpoint, socketChannel);<a name="line.382"></a>
<span class="sourceLineNo">383</span>        this.connections.add(connection);<a name="line.383"></a>
<span class="sourceLineNo">384</span>        return connection;<a name="line.384"></a>
<span class="sourceLineNo">385</span>    }<a name="line.385"></a>
<span class="sourceLineNo">386</span><a name="line.386"></a>
<span class="sourceLineNo">387</span>    // Invoked when a message arrives on a connection<a name="line.387"></a>
<span class="sourceLineNo">388</span>    void handleMessage(Connection connection, MsrpMessage message) throws IOException {<a name="line.388"></a>
<span class="sourceLineNo">389</span><a name="line.389"></a>
<span class="sourceLineNo">390</span>        // Find session<a name="line.390"></a>
<span class="sourceLineNo">391</span>        final MsrpUri localURI = message.getHeaders().getToPath().get(0);<a name="line.391"></a>
<span class="sourceLineNo">392</span>        final Session session = this.sessionMap.get(localURI);<a name="line.392"></a>
<span class="sourceLineNo">393</span>        if (session == null) {<a name="line.393"></a>
<span class="sourceLineNo">394</span>            if (message instanceof MsrpRequest) {<a name="line.394"></a>
<span class="sourceLineNo">395</span>                connection.write(Session.createMsrpResponse((MsrpRequest)message,<a name="line.395"></a>
<span class="sourceLineNo">396</span>                  MsrpConstants.RESPONSE_CODE_SESSION_DOES_NOT_EXIST, "Session does not exist"));<a name="line.396"></a>
<span class="sourceLineNo">397</span>            }<a name="line.397"></a>
<span class="sourceLineNo">398</span>            return;<a name="line.398"></a>
<span class="sourceLineNo">399</span>        }<a name="line.399"></a>
<span class="sourceLineNo">400</span><a name="line.400"></a>
<span class="sourceLineNo">401</span>        // Verify/bind connection<a name="line.401"></a>
<span class="sourceLineNo">402</span>        if (session.getConnection() == null) {<a name="line.402"></a>
<span class="sourceLineNo">403</span>            if (this.log.isDebugEnabled())<a name="line.403"></a>
<span class="sourceLineNo">404</span>                this.log.debug(this + " binding " + session + " to " + connection);<a name="line.404"></a>
<span class="sourceLineNo">405</span>            session.setConnection(connection);<a name="line.405"></a>
<span class="sourceLineNo">406</span>            this.wakeup();<a name="line.406"></a>
<span class="sourceLineNo">407</span>        } else if (!session.getConnection().equals(connection)) {<a name="line.407"></a>
<span class="sourceLineNo">408</span>            if (message instanceof MsrpRequest) {<a name="line.408"></a>
<span class="sourceLineNo">409</span>                connection.write(Session.createMsrpResponse((MsrpRequest)message,<a name="line.409"></a>
<span class="sourceLineNo">410</span>                  MsrpConstants.RESPONSE_CODE_SESSION_ALREADY_BOUND, "Session already bound to a different connection"));<a name="line.410"></a>
<span class="sourceLineNo">411</span>            }<a name="line.411"></a>
<span class="sourceLineNo">412</span>            return;<a name="line.412"></a>
<span class="sourceLineNo">413</span>        }<a name="line.413"></a>
<span class="sourceLineNo">414</span><a name="line.414"></a>
<span class="sourceLineNo">415</span>        // Handle message<a name="line.415"></a>
<span class="sourceLineNo">416</span>        session.handleMessage(message);<a name="line.416"></a>
<span class="sourceLineNo">417</span>    }<a name="line.417"></a>
<span class="sourceLineNo">418</span><a name="line.418"></a>
<span class="sourceLineNo">419</span>    // Invoked when a connection closes<a name="line.419"></a>
<span class="sourceLineNo">420</span>    void handleConnectionClosed(Connection connection, Exception cause) {<a name="line.420"></a>
<span class="sourceLineNo">421</span>        if (this.log.isDebugEnabled())<a name="line.421"></a>
<span class="sourceLineNo">422</span>            this.log.debug(this + " handling closed connection " + connection);<a name="line.422"></a>
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<span class="sourceLineNo">424</span>            final Session session = i.next();<a name="line.424"></a>
<span class="sourceLineNo">425</span>            if (connection.equals(session.getConnection())) {<a name="line.425"></a>
<span class="sourceLineNo">426</span>                i.remove();<a name="line.426"></a>
<span class="sourceLineNo">427</span>                session.close(cause);<a name="line.427"></a>
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<span class="sourceLineNo">430</span>        this.connections.remove(connection);<a name="line.430"></a>
<span class="sourceLineNo">431</span>        this.wakeup();<a name="line.431"></a>
<span class="sourceLineNo">432</span>    }<a name="line.432"></a>
<span class="sourceLineNo">433</span><a name="line.433"></a>
<span class="sourceLineNo">434</span>    // Invoked when a session closes<a name="line.434"></a>
<span class="sourceLineNo">435</span>    void handleSessionClosed(Session session) {<a name="line.435"></a>
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<span class="sourceLineNo">437</span>            this.log.debug(this + " handling closed session " + session);<a name="line.437"></a>
<span class="sourceLineNo">438</span>        this.sessionMap.remove(session.getLocalUri());<a name="line.438"></a>
<span class="sourceLineNo">439</span>        this.wakeup();<a name="line.439"></a>
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<span class="sourceLineNo">441</span><a name="line.441"></a>
<span class="sourceLineNo">442</span>    // Invoked when a connection needs to select for I/O<a name="line.442"></a>
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<span class="sourceLineNo">446</span>        if (service == null)<a name="line.446"></a>
<span class="sourceLineNo">447</span>            throw new IllegalArgumentException("null service");<a name="line.447"></a>
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<span class="sourceLineNo">450</span>        return channel.register(this.selector, 0, service);<a name="line.450"></a>
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<span class="sourceLineNo">452</span><a name="line.452"></a>
<span class="sourceLineNo">453</span>    // Invoked when we get an incoming connection<a name="line.453"></a>
<span class="sourceLineNo">454</span>    private void handleAccept() throws IOException {<a name="line.454"></a>
<span class="sourceLineNo">455</span><a name="line.455"></a>
<span class="sourceLineNo">456</span>        // Check connection size limit<a name="line.456"></a>
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<span class="sourceLineNo">459</span>              + this.maxSessions + "), not accepting any more (for now)");<a name="line.459"></a>
<span class="sourceLineNo">460</span>            this.selectForAccept(false);<a name="line.460"></a>
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<span class="sourceLineNo">463</span><a name="line.463"></a>
<span class="sourceLineNo">464</span>        // Accept connection<a name="line.464"></a>
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<span class="sourceLineNo">466</span>        if (socketChannel == null)<a name="line.466"></a>
<span class="sourceLineNo">467</span>            return;<a name="line.467"></a>
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<span class="sourceLineNo">469</span><a name="line.469"></a>
<span class="sourceLineNo">470</span>        // Get remote endpoint<a name="line.470"></a>
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<span class="sourceLineNo">472</span>        final Endpoint endpoint = new Endpoint(remote.getHostString(), remote.getPort());<a name="line.472"></a>
<span class="sourceLineNo">473</span>        if (this.log.isDebugEnabled())<a name="line.473"></a>
<span class="sourceLineNo">474</span>            this.log.debug(this + " accepted incoming connection from " + endpoint);<a name="line.474"></a>
<span class="sourceLineNo">475</span><a name="line.475"></a>
<span class="sourceLineNo">476</span>        // Add new connection<a name="line.476"></a>
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<span class="sourceLineNo">479</span><a name="line.479"></a>
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<span class="sourceLineNo">482</span>        if (this.selectionKey == null)<a name="line.482"></a>
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<span class="sourceLineNo">490</span>            if (this.log.isDebugEnabled())<a name="line.490"></a>
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<span class="sourceLineNo">494</span><a name="line.494"></a>
<span class="sourceLineNo">495</span>    // Wakeup service thread<a name="line.495"></a>
<span class="sourceLineNo">496</span>    void wakeup() {<a name="line.496"></a>
<span class="sourceLineNo">497</span>        if (this.log.isTraceEnabled())<a name="line.497"></a>
<span class="sourceLineNo">498</span>            this.log.trace("wakeup service thread");<a name="line.498"></a>
<span class="sourceLineNo">499</span>        if (this.selector != null)<a name="line.499"></a>
<span class="sourceLineNo">500</span>            this.selector.wakeup();<a name="line.500"></a>
<span class="sourceLineNo">501</span>    }<a name="line.501"></a>
<span class="sourceLineNo">502</span><a name="line.502"></a>
<span class="sourceLineNo">503</span>// Main service method<a name="line.503"></a>
<span class="sourceLineNo">504</span><a name="line.504"></a>
<span class="sourceLineNo">505</span>    private void service() throws IOException {<a name="line.505"></a>
<span class="sourceLineNo">506</span>        while (true) {<a name="line.506"></a>
<span class="sourceLineNo">507</span><a name="line.507"></a>
<span class="sourceLineNo">508</span>            // Check if we're still open<a name="line.508"></a>
<span class="sourceLineNo">509</span>            final Selector currentSelector;<a name="line.509"></a>
<span class="sourceLineNo">510</span>            synchronized (this) {<a name="line.510"></a>
<span class="sourceLineNo">511</span>                currentSelector = this.selector;<a name="line.511"></a>
<span class="sourceLineNo">512</span>            }<a name="line.512"></a>
<span class="sourceLineNo">513</span>            if (currentSelector == null)<a name="line.513"></a>
<span class="sourceLineNo">514</span>                break;<a name="line.514"></a>
<span class="sourceLineNo">515</span><a name="line.515"></a>
<span class="sourceLineNo">516</span>            // Wait for I/O readiness, timeout, or shutdown<a name="line.516"></a>
<span class="sourceLineNo">517</span>            try {<a name="line.517"></a>
<span class="sourceLineNo">518</span>                if (this.log.isTraceEnabled())<a name="line.518"></a>
<span class="sourceLineNo">519</span>                    this.log.trace("[SVC THREAD]: sleeping: keys=" + dbg(currentSelector.keys()));<a name="line.519"></a>
<span class="sourceLineNo">520</span>                currentSelector.select(1000L);<a name="line.520"></a>
<span class="sourceLineNo">521</span>            } catch (ClosedSelectorException e) {               // close() was invoked<a name="line.521"></a>
<span class="sourceLineNo">522</span>                break;<a name="line.522"></a>
<span class="sourceLineNo">523</span>            }<a name="line.523"></a>
<span class="sourceLineNo">524</span>            if (Thread.interrupted())<a name="line.524"></a>
<span class="sourceLineNo">525</span>                break;<a name="line.525"></a>
<span class="sourceLineNo">526</span><a name="line.526"></a>
<span class="sourceLineNo">527</span>            // Figure out what has happened<a name="line.527"></a>
<span class="sourceLineNo">528</span>            synchronized (this) {<a name="line.528"></a>
<span class="sourceLineNo">529</span><a name="line.529"></a>
<span class="sourceLineNo">530</span>                // Are we shutting down?<a name="line.530"></a>
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<span class="sourceLineNo">532</span>                    for (Connection connection : new ArrayList&lt;Connection&gt;(this.connections))<a name="line.532"></a>
<span class="sourceLineNo">533</span>                        connection.close(null);<a name="line.533"></a>
<span class="sourceLineNo">534</span>                    break;<a name="line.534"></a>
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<span class="sourceLineNo">536</span><a name="line.536"></a>
<span class="sourceLineNo">537</span>                // Handle any ready I/O<a name="line.537"></a>
<span class="sourceLineNo">538</span>                if (this.log.isTraceEnabled())<a name="line.538"></a>
<span class="sourceLineNo">539</span>                    this.log.trace("[SVC THREAD]: awake: selectedKeys=" + dbg(currentSelector.selectedKeys()));<a name="line.539"></a>
<span class="sourceLineNo">540</span>                for (Iterator&lt;SelectionKey&gt; i = selector.selectedKeys().iterator(); i.hasNext(); ) {<a name="line.540"></a>
<span class="sourceLineNo">541</span>                    final SelectionKey key = i.next();<a name="line.541"></a>
<span class="sourceLineNo">542</span>                    i.remove();<a name="line.542"></a>
<span class="sourceLineNo">543</span>                    final SelectorService service = (SelectorService)key.attachment();<a name="line.543"></a>
<span class="sourceLineNo">544</span>                    if (this.log.isTraceEnabled())<a name="line.544"></a>
<span class="sourceLineNo">545</span>                        this.log.trace("[SVC THREAD]: I/O ready: key=" + dbg(key) + " service=" + service);<a name="line.545"></a>
<span class="sourceLineNo">546</span>                    try {<a name="line.546"></a>
<span class="sourceLineNo">547</span>                        service.serviceIO(key);<a name="line.547"></a>
<span class="sourceLineNo">548</span>                    } catch (IOException e) {<a name="line.548"></a>
<span class="sourceLineNo">549</span>                        if (this.log.isDebugEnabled())<a name="line.549"></a>
<span class="sourceLineNo">550</span>                            this.log.debug("MSRP I/O error from " + service, e);<a name="line.550"></a>
<span class="sourceLineNo">551</span>                        service.close(e);<a name="line.551"></a>
<span class="sourceLineNo">552</span>                    } catch (Exception e) {<a name="line.552"></a>
<span class="sourceLineNo">553</span>                        this.log.error("MSRP service error from " + service, e);<a name="line.553"></a>
<span class="sourceLineNo">554</span>                        service.close(e);<a name="line.554"></a>
<span class="sourceLineNo">555</span>                    }<a name="line.555"></a>
<span class="sourceLineNo">556</span>                }<a name="line.556"></a>
<span class="sourceLineNo">557</span><a name="line.557"></a>
<span class="sourceLineNo">558</span>                // Perform session housekeeping<a name="line.558"></a>
<span class="sourceLineNo">559</span>                final HashSet&lt;Connection&gt; activeConnections = new HashSet&lt;&gt;();<a name="line.559"></a>
<span class="sourceLineNo">560</span>                for (Session session : new ArrayList&lt;Session&gt;(this.sessionMap.values())) {<a name="line.560"></a>
<span class="sourceLineNo">561</span>                    if (session.getConnection() != null)<a name="line.561"></a>
<span class="sourceLineNo">562</span>                        activeConnections.add(session.getConnection());<a name="line.562"></a>
<span class="sourceLineNo">563</span>                    try {<a name="line.563"></a>
<span class="sourceLineNo">564</span>                        session.performHousekeeping();<a name="line.564"></a>
<span class="sourceLineNo">565</span>                    } catch (IOException e) {<a name="line.565"></a>
<span class="sourceLineNo">566</span>                        if (this.log.isDebugEnabled())<a name="line.566"></a>
<span class="sourceLineNo">567</span>                            this.log.debug("MSRP I/O error from " + session, e);<a name="line.567"></a>
<span class="sourceLineNo">568</span>                        session.close(e);<a name="line.568"></a>
<span class="sourceLineNo">569</span>                    } catch (Exception e) {<a name="line.569"></a>
<span class="sourceLineNo">570</span>                        this.log.error("error performing housekeeping for " + session, e);<a name="line.570"></a>
<span class="sourceLineNo">571</span>                        session.close(e);<a name="line.571"></a>
<span class="sourceLineNo">572</span>                    }<a name="line.572"></a>
<span class="sourceLineNo">573</span>                }<a name="line.573"></a>
<span class="sourceLineNo">574</span><a name="line.574"></a>
<span class="sourceLineNo">575</span>                // Perform connection housekeeping<a name="line.575"></a>
<span class="sourceLineNo">576</span>                for (Connection connection : new ArrayList&lt;Connection&gt;(this.connections)) {<a name="line.576"></a>
<span class="sourceLineNo">577</span>                    try {<a name="line.577"></a>
<span class="sourceLineNo">578</span>                        connection.performHousekeeping(activeConnections.contains(connection));<a name="line.578"></a>
<span class="sourceLineNo">579</span>                    } catch (IOException e) {<a name="line.579"></a>
<span class="sourceLineNo">580</span>                        if (this.log.isDebugEnabled())<a name="line.580"></a>
<span class="sourceLineNo">581</span>                            this.log.debug("MSRP I/O error from " + connection, e);<a name="line.581"></a>
<span class="sourceLineNo">582</span>                        connection.close(e);<a name="line.582"></a>
<span class="sourceLineNo">583</span>                    } catch (Exception e) {<a name="line.583"></a>
<span class="sourceLineNo">584</span>                        this.log.error("error performing housekeeping for " + connection, e);<a name="line.584"></a>
<span class="sourceLineNo">585</span>                        connection.close(e);<a name="line.585"></a>
<span class="sourceLineNo">586</span>                    }<a name="line.586"></a>
<span class="sourceLineNo">587</span>                }<a name="line.587"></a>
<span class="sourceLineNo">588</span><a name="line.588"></a>
<span class="sourceLineNo">589</span>                // Perform my own housekeeping<a name="line.589"></a>
<span class="sourceLineNo">590</span>                this.selectForAccept(this.connections.size() &lt; this.maxSessions);<a name="line.590"></a>
<span class="sourceLineNo">591</span>            }<a name="line.591"></a>
<span class="sourceLineNo">592</span>        }<a name="line.592"></a>
<span class="sourceLineNo">593</span>    }<a name="line.593"></a>
<span class="sourceLineNo">594</span><a name="line.594"></a>
<span class="sourceLineNo">595</span>    private static String dbg(Iterable&lt;? extends SelectionKey&gt; keys) {<a name="line.595"></a>
<span class="sourceLineNo">596</span>        final ArrayList&lt;String&gt; strings = new ArrayList&lt;&gt;();<a name="line.596"></a>
<span class="sourceLineNo">597</span>        for (SelectionKey key : keys)<a name="line.597"></a>
<span class="sourceLineNo">598</span>            strings.add(dbg(key));<a name="line.598"></a>
<span class="sourceLineNo">599</span>        return strings.toString();<a name="line.599"></a>
<span class="sourceLineNo">600</span>    }<a name="line.600"></a>
<span class="sourceLineNo">601</span><a name="line.601"></a>
<span class="sourceLineNo">602</span>    private static String dbg(SelectionKey key) {<a name="line.602"></a>
<span class="sourceLineNo">603</span>        try {<a name="line.603"></a>
<span class="sourceLineNo">604</span>            return "Key[interest=" + dbgOps(key.interestOps()) + ",ready="<a name="line.604"></a>
<span class="sourceLineNo">605</span>              + dbgOps(key.readyOps()) + ",obj=" + key.attachment() + "]";<a name="line.605"></a>
<span class="sourceLineNo">606</span>        } catch (java.nio.channels.CancelledKeyException e) {<a name="line.606"></a>
<span class="sourceLineNo">607</span>            return "Key[canceled]";<a name="line.607"></a>
<span class="sourceLineNo">608</span>        }<a name="line.608"></a>
<span class="sourceLineNo">609</span>    }<a name="line.609"></a>
<span class="sourceLineNo">610</span><a name="line.610"></a>
<span class="sourceLineNo">611</span>    private static String dbgOps(int ops) {<a name="line.611"></a>
<span class="sourceLineNo">612</span>        final StringBuilder buf = new StringBuilder(4);<a name="line.612"></a>
<span class="sourceLineNo">613</span>        if ((ops &amp; SelectionKey.OP_ACCEPT) != 0)<a name="line.613"></a>
<span class="sourceLineNo">614</span>            buf.append("A");<a name="line.614"></a>
<span class="sourceLineNo">615</span>        if ((ops &amp; SelectionKey.OP_CONNECT) != 0)<a name="line.615"></a>
<span class="sourceLineNo">616</span>            buf.append("C");<a name="line.616"></a>
<span class="sourceLineNo">617</span>        if ((ops &amp; SelectionKey.OP_READ) != 0)<a name="line.617"></a>
<span class="sourceLineNo">618</span>            buf.append("R");<a name="line.618"></a>
<span class="sourceLineNo">619</span>        if ((ops &amp; SelectionKey.OP_WRITE) != 0)<a name="line.619"></a>
<span class="sourceLineNo">620</span>            buf.append("W");<a name="line.620"></a>
<span class="sourceLineNo">621</span>        return buf.toString();<a name="line.621"></a>
<span class="sourceLineNo">622</span>    }<a name="line.622"></a>
<span class="sourceLineNo">623</span><a name="line.623"></a>
<span class="sourceLineNo">624</span>// ServiceThread<a name="line.624"></a>
<span class="sourceLineNo">625</span><a name="line.625"></a>
<span class="sourceLineNo">626</span>    private class ServiceThread extends Thread {<a name="line.626"></a>
<span class="sourceLineNo">627</span><a name="line.627"></a>
<span class="sourceLineNo">628</span>        public ServiceThread() {<a name="line.628"></a>
<span class="sourceLineNo">629</span>            super("MSRP Service Thread for " + Msrp.this);<a name="line.629"></a>
<span class="sourceLineNo">630</span>        }<a name="line.630"></a>
<span class="sourceLineNo">631</span><a name="line.631"></a>
<span class="sourceLineNo">632</span>        @Override<a name="line.632"></a>
<span class="sourceLineNo">633</span>        public void run() {<a name="line.633"></a>
<span class="sourceLineNo">634</span>            try {<a name="line.634"></a>
<span class="sourceLineNo">635</span>                Msrp.this.service();<a name="line.635"></a>
<span class="sourceLineNo">636</span>            } catch (ThreadDeath t) {<a name="line.636"></a>
<span class="sourceLineNo">637</span>                throw t;<a name="line.637"></a>
<span class="sourceLineNo">638</span>            } catch (Throwable t) {<a name="line.638"></a>
<span class="sourceLineNo">639</span>                Msrp.this.log.error("unexpected error in service thread", t);<a name="line.639"></a>
<span class="sourceLineNo">640</span>            }<a name="line.640"></a>
<span class="sourceLineNo">641</span>            if (Msrp.this.log.isDebugEnabled())<a name="line.641"></a>
<span class="sourceLineNo">642</span>                Msrp.this.log.debug(this + " exiting");<a name="line.642"></a>
<span class="sourceLineNo">643</span>        }<a name="line.643"></a>
<span class="sourceLineNo">644</span>    }<a name="line.644"></a>
<span class="sourceLineNo">645</span>}<a name="line.645"></a>
<span class="sourceLineNo">646</span><a name="line.646"></a>




























































</pre>
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